[IGSMAIL-6490] SX5 Splinter Session at the European Space Weather Week in Namur, Belgium

[Stefan Junker]

Author: Stefan Junker

Dear Colleagues,

We kindly invite you to join the SX5 splinter session:

First Results of the SX5 Project - Single-Frequency VTEC Retrieval with
GPS and Galileo

by T. Schueler, O. Oladipo (University FAF Munich, Germany)
on Tuesday, Nov 29, 16:30-18:30

at the upcoming ESWW in Belgium. Please find abstract and agenda below.

SX5 is a project devoted to the scientific exploitation of Europe's
Galileo E5 wide-band signal and funded by the European Union (FP7) with
applications in the fields of atmospheric parameter retrieval and
precise positioning. Single-frequency ionosphere monitoring will be in
the focus of this splinter meeting.

It is commonly believed that GNSS ionospheric delay estimation (or VTEC
retrieval) essentially requires dual-frequency receivers. This claim is
not true. In particular, the Galileo E5 signal is a distinct low-noise
signal, and a combination of code range and carrier phase measurements
can be successfully used in a single-frequency ionosphere monitoring
algorithm. Both data from GPS and Galileo are supported.
Single-frequency GNSS receivers are much cheaper than dual-frequency
devices, so that the single-frequency VTEC monitoring approach can also
be interesting from the commercial point of view.

This splinter session is devoted to the presentation and discussion of
the single-frequency ionosphere monitoring method developed in the SX5
project. The following aspects are planned for this meeting:

1. Introduction to single-frequency ionosphere monitoring with Galileo
and GPS. Theory behind, data modeling, retrieval algorithm, adjustment
procedure, sequential filter, separation of ionospheric delay
information from ambiguity terms, GNSS signals and the benefit of
Galileo E5 vs. GPS L1.

2. Test cases and results, both using real-world GPS L1 and GPS L2 data
as well as synthetic Galileo E5 broadband signal data. 2006 Greece
earthquake example, October 2003 ionosphere storm test case, GPS L1 and
L2 validation campaign using GPS high-rate data of the IGS network for
more than 40 stations (VTEC RMS: 4 TECU global average, 1.5-2.5 TECU in
mid-latitudes, 5-10 TECU for stations near geomagnetic equator).

3. Comparison of retrieval results with ionosphere models such as
IRI-2007 and NeQuick2 (a special version NeQuick G is foreseen as
standard correction model for the Galileo satellite navigation system).

4. Ionospheric data processing for SX5 project. (J. Boska, D. Kouba, J.
Lastovicka, IAP, Prague, Czech Republic)

For further questions, please do not hesitate to contact us via
sx5 at unibw.de.

Kind regards,
The SX5 Team